brian flores, ktvu channel 2 news. >>> 8:33. crews will be shutting down part of a busy contra costa road today because of a potential sinkhole. right now, one lane of marsh creek road in clayton is closed. crews are trying to fix the road because a culvert has failed and a potential sinkhole is starting to form. at 9:00 this morning, marsh creek will be completely shut down between deer valley road and pine lane. drivers will be reouted but people who live in the area will still have access to their homes. >>> 8:34. sal is watching that and everything else. you are starting in contra costa county, though. >> that's right the we're looking at highway 4 to start this report off. highway 4 looks pretty good. it's improved a little bit. there goes b.a.r.t. b.a.r.t. is a good way to get there. if you are driving late this morning, it could be a benefit for you. 680 is slow. looking at the toll plaza, it's -- that's improve the quite a bit. it's still about a 15-minute delay. you can see the traffic coming in from 880 is lighter. if